Java by API/java.util/Date
Содержание
Date: after(Date when)
<source lang="java">
/* Mon Jan 01 00:00:00 PST 2001 is after Sat Jan 01 00:00:00 PST 2000
* */
import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Date; public class MainClass {
public static void main(String[] a) throws Exception{
DateFormat df = new SimpleDateFormat ("yyyy-MM-dd");
Date d1 = df.parse("2001-01-01");
Date d2 = df.parse("2000-01-01");
String relation;
if (d1.equals(d2))
relation = "the same date as";
else if (d1.before(d2))
relation = "before";
else if (d1.after(d2))
relation = "after";
System.out.println(d1 + " is " + relation + " " + d2);
}
}
</source>
Date: before(Date when)
<source lang="java">
/* Mon Jan 01 00:00:00 PST 2001 is after Sat Jan 01 00:00:00 PST 2000
* */
import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Date; public class MainClass {
public static void main(String[] a) throws Exception{
DateFormat df = new SimpleDateFormat ("yyyy-MM-dd");
Date d1 = df.parse("2001-01-01");
Date d2 = df.parse("2000-01-01");
String relation;
if (d1.equals(d2))
relation = "the same date as";
else if (d1.before(d2))
relation = "before";
else if (d1.after(d2))
relation = "after";
System.out.println(d1 + " is " + relation + " " + d2);
}
}
</source>
Date: diff (Not a method)
<source lang="java">
/* The 21st century (up to Thu May 11 14:14:02 PDT 2006) is 1956 days old.
* */
import java.util.Date; import java.util.GregorianCalendar; public class MainClass {
public static void main(String[] a) throws Exception {
Date d1 = new GregorianCalendar(2000,11,31,23,59).getTime();
Date today = new Date();
long diff = today.getTime() - d1.getTime();
System.out.println("The 21st century (up to " + today +
") is " + (diff / (1000*60*60*24)) + " days old.");
}
}
</source>
Date: equals(Object anotherDate)
<source lang="java">
/* Mon Jan 01 00:00:00 PST 2001 is after Sat Jan 01 00:00:00 PST 2000
* */
import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Date; public class MainClass {
public static void main(String[] a) throws Exception{
DateFormat df = new SimpleDateFormat ("yyyy-MM-dd");
Date d1 = df.parse("2001-01-01");
Date d2 = df.parse("2000-01-01");
String relation;
if (d1.equals(d2))
relation = "the same date as";
else if (d1.before(d2))
relation = "before";
else if (d1.after(d2))
relation = "after";
System.out.println(d1 + " is " + relation + " " + d2);
}
}
</source>
Date: getTime()
<source lang="java">
/*
* Output:
13263
*/
import java.util.Date; public class MainClass {
public static void main(String args[]) {
Date currentDate = new Date();
long msec = currentDate.getTime();
long days = msec/(24 * 60 * 60 * 1000);
System.out.println(days);
}
}
</source>
Date: setTime(long miliseconds)
<source lang="java">
/*
* Output:
Thu Aug 03 13:27:11 PDT 2006
*/
import java.util.*; public class MainClass {
public static void main(String args[]) {
Date date = new Date();
long msec = date.getTime();
msec += 100 * 24 * 60 * 60 * 1000L;
date.setTime(msec);
System.out.println(date);
}
}
</source>
new Date()
<source lang="java">
/*
* Output:
Tue Apr 25 13:25:27 PDT 2006 Wed Dec 31 16:00:00 PST 1969
*/
import java.util.Date; public class MainClass {
public static void main(String args[]) {
Date currentDate = new Date();
System.out.println(currentDate);
// Get date object initialized to the epoch (Jan 1 1970)
Date epoch = new Date(0);
System.out.println(epoch);
}
}
</source>
new Date(int intValue)
<source lang="java">
/*
* Output:
Tue Apr 25 13:25:27 PDT 2006 Wed Dec 31 16:00:00 PST 1969
*/
import java.util.Date; public class MainClass {
public static void main(String args[]) {
Date currentDate = new Date();
System.out.println(currentDate);
// Get date object initialized to the epoch (Jan 1 1970)
Date epoch = new Date(0);
System.out.println(epoch);
}
}
</source>
